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561 results on '"Seyfarth, Robert"'

1. The long lives of primates and the 'invariant rate of ageing' hypothesis.

Author

Colchero, Fernando, Aburto, José Manuel, Archie, Elizabeth A, Boesch, Christophe, Breuer, Thomas, Campos, Fernando A, Collins, Anthony, Conde, Dalia A, Cords, Marina, Crockford, Catherine, Thompson, Melissa Emery, Fedigan, Linda M, Fichtel, Claudia, Groenenberg, Milou, Hobaiter, Catherine, Kappeler, Peter M, Lawler, Richard R, Lewis, Rebecca J, Machanda, Zarin P, Manguette, Marie L, Muller, Martin N, Packer, Craig, Parnell, Richard J, Perry, Susan, Pusey, Anne E, Robbins, Martha M, Seyfarth, Robert M, Silk, Joan B, Staerk, Johanna, Stoinski, Tara S, Stokes, Emma J, Strier, Karen B, Strum, Shirley C, Tung, Jenny, Villavicencio, Francisco, Wittig, Roman M, Wrangham, Richard W, Zuberbühler, Klaus, Vaupel, James W, and Alberts, Susan C

Subjects
Animals, Primates, Humans, Life Expectancy, Mortality, Models, Statistical, Age Factors, Aging, Longevity, Female, Male, 1.2 Psychological and socioeconomic processes, Underpinning research, Generic health relevance, Good Health and Well Being
Abstract

Is it possible to slow the rate of ageing, or do biological constraints limit its plasticity? We test the 'invariant rate of ageing' hypothesis, which posits that the rate of ageing is relatively fixed within species, with a collection of 39 human and nonhuman primate datasets across seven genera. We first recapitulate, in nonhuman primates, the highly regular relationship between life expectancy and lifespan equality seen in humans. We next demonstrate that variation in the rate of ageing within genera is orders of magnitude smaller than variation in pre-adult and age-independent mortality. Finally, we demonstrate that changes in the rate of ageing, but not other mortality parameters, produce striking, species-atypical changes in mortality patterns. Our results support the invariant rate of ageing hypothesis, implying biological constraints on how much the human rate of ageing can be slowed.

Published
2021

5. Female chacma baboons form strong, equitable, and enduring social bonds

Author

Silk, Joan B., Beehner, Jacinta C., Bergman, Thore J., Crockford, Catherine, Engh, Anne L., Moscovice, Liza R., Wittig, Roman M., Seyfarth, Robert M., and Cheney, Dorothy L.

Subjects
Life Sciences, Behavioural Sciences, Evolutionary Biology, Zoology, Baboons, Social bonds, Kinship, Coalitions
Abstract

Analyses of the pattern of associations, social interactions, coalitions, and aggression among chacma baboons (Papio hamadryas ursinus) in the Okavango Delta of Botswana over a 16-year period indicate that adult females form close, equitable, supportive, and enduring social relationships. They show strong and stable preferences for close kin, particularly their own mothers and daughters. Females also form strong attachments to unrelated females who are close to their own age and who are likely to be paternal half-sisters. Although absolute rates of aggression among kin are as high as rates of aggression among nonkin, females are more tolerant of close relatives than they are of others with whom they have comparable amounts of contact. These findings complement previous work which indicates that the strength of social bonds enhances the fitness of females in this population and support findings about the structure and function of social bonds in other primate groups.

Published
2010

28. Production, Usage, and Comprehension in Animal Vocalizations

Author

Seyfarth, Robert M. and Cheney, Dorothy L.

Abstract

In this review, we place equal emphasis on production, usage, and comprehension because these components of communication may exhibit different developmental trajectories and be affected by different neural mechanisms. In the animal kingdom generally, learned, flexible vocal production is rare, appearing in only a few orders of birds and few species of mammals. Compared with humans, the majority of species produce a limited repertoire of calls that show little modification during development. Call usage is also highly constrained. Unlike humans, most animals use specific call types only in a limited range of contexts. In marked contrast to production and usage, animals' comprehension of vocalizations, as measured by their responses, are highly flexible, modifiable as a result of experience, and show the most parallels with human language. The differences among vocal production, usage, and comprehension create an oddly asymmetric system of communication in which a small repertoire of relatively fixed calls, each linked to a particular context, can nonetheless give rise to an open-ended, highly modifiable, and cognitively rich set of meanings. Recent studies of baboons and eavesdropping songbirds provide two examples.

Published
2010
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